Results 21 to 30 of about 88,883 (302)
Effect of C-S-H Nucleating Agent on Cement Hydration
Applied Sciences, 2021 This work aims to study the effect of a nucleating agent on cement hydration. Firstly, the C-S-H crystal nucleation early strength agent (CNA) is prepared.
Wenhao Zhao +3 more
doaj +1 more source
Detection and Production of Methane Hydrate [PDF]
, 2011 This project seeks to understand regional differences in gas hydrate systems from the perspective of as an energy resource, geohazard, and long-term climate influence. Specifically, the effort will: (1) collect data and conceptual models that targets causes of gas hydrate variance, (2) construct numerical models that explain and predict regional-scale ...
Hirasaki, George +6 more
openaire +2 more sources
Composition of Hydration Products
The Journal of the Society of Chemical Industry, Japan, 1964 前報では,種々の水和反応温度でそれぞれの水和過程および水和生成物,水和物をX線回折,熱天秤分析および化学分析によって調べた結果を報告した。本報では,X線回折,示差熱分析および赤外線吸収スペクトルなどの手段によって完全水和生成物,完全水和物試料の組成につき検討を試みた。そこで, 50,80および100℃の水和反応で得られた試料につきX 線回折図の変化を検討し, さらに示差熱分析によって加熱変化の機構を調べた。一方,完全水和物が新しい結晶性の物質であるとの知見を得るため,赤外吸収スペクトルの測定を行なった。その結果,完全水和物は新しい化合物で結晶性の物質であることが明らかになった。また加熱による脱水反応から相変化を容易に生じ新しい結晶構造を示すことを知った。なお ...
Masumi Komizu, Kenjiro Meguro
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Hydration study of ordinary portland cement in the presence of zinc ions
Materials Research, 2007 Hydration products of Portland cement pastes, hydrated in water and in the presence of zinc ions were studied comparatively at different ages. Hydration products were studied by X ray diffractions (XRD) and infrared spectroscopy (IR).
Monica Adriana Trezza
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Brazilian Journal of Oncology, 2021 Background: New antineoplastic agents have increased the survival rate of cancer patients, however, the incidence of cutaneous skin toxicity, which leads to worsening in the quality of life and to the necessity of interrupting the treatment, continues ...
Carlos D`App Santos Machado-Filho +2 more
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Hydration characteristics of red-mud based paste-like backfill material
工程科学学报, 2017 Preparation of red-mud based paste-like backfill material using red mud, coal gangue, and other industrial solid wastes was accounted. In order to understand the hydration characteristics of red-mud based paste-like backfill material, X-ray diffraction ...
CHEN Jiao-long +4 more
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Nanomaterials, 2022 Low-carbon ecological cement composites are among the most promising construction materials. With low energy consumption, low carbon dioxide emissions, and high early strength, sulfoaluminate cement (SAC) is a low-carbon ecological building material.
Kai Cui +3 more
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Hydration kinetics and shrinkage behavior of hybrid alkaline cements
, 2021 Hybrid alkaline cement (HAC) which is composed of more than 70% supplementary cementitious materials (SCMs), less than 30% Portland cement and a small dosage of alkali activator is considered as a promising alternative material to Portland cement due to ...
Xue, Lili
core +1 more source
Calculation of Constrained Stress in Expansive Mortar with a Composite Creep Model
Advances in Materials Science and Engineering, 2016 The creep phenomenon of hardening cement paste mixed with an expansive additive was modeled by considering the creep performance of hydration products of cement and expansive additive.
Hyeonggil Choi, Bongsuk Cho
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矿业科学学报, 2019 Lithium slag is used as a supplementary cementitious material in cement-based materials due to its pozzolanic activity,but its lower hydration activity leads to a decline in the mechanical properties and durability of the cement-based material.In this ...
Wang Yiren +3 more
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